31213023330 has 16 divisors (see below), whose sum is σ = 74911256064. Its totient is φ = 8323472880.

The previous prime is 31213023329. The next prime is 31213023343. The reversal of 31213023330 is 3332031213.

It is a junction number, because it is equal to n+sod(n) for n = 31213023297 and 31213023306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520217026 + ... + 520217085.

It is an arithmetic number, because the mean of its divisors is an integer number (4681953504).

Almost surely, 2^31213023330 is an apocalyptic number.

31213023330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31213023330 is an abundant number, since it is smaller than the sum of its proper divisors (43698232734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31213023330 is a wasteful number, since it uses less digits than its factorization.

31213023330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040434121.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31213023330 its reverse (3332031213), we get a palindrome (34545054543).

The spelling of 31213023330 in words is "thirty-one billion, two hundred thirteen million, twenty-three thousand, three hundred thirty".